Glue window closes on 3D scatter plotting data in fits file

[abhijeetmanhas]

Describe the bug

I don't know whether it is right to raise issue here or main glue repo, as it was dealing with fits file so I raised here. It was importing Astronomy WCS plugin.

So the error is, when I try to plot light curve data from a fits file using 3D scatter plot, the glue window get closed without giving a message popup. The error log is given below:

To Reproduce
Steps to reproduce the behavior such as:

1. Download fits file for exoplanet light curve https://www.cfa.harvard.edu/~avanderb/k2c19/ep206295996.html .
2. Open glue and import file.
3. Use 3D scatter option for visualization.
4. See error

Expected behavior
Window should remain open and just display message like below or similar:

Incompatible way of displaying data.

Error Log

/home/abhimanhas/anaconda3/envs/sunpy-dev/lib/python3.7/site-packages/glue_vispy_viewers/extern/vispy/visuals/markers.py:560: FutureWarning: Passing (type, 1) or '1type' as a synonym of type is deprecated; in a future version of numpy, it will be understood as (type, (1,)) / '(1,)type'.
  ('a_edgewidth', np.float32, 1)])
Segmentation fault (core dumped)

Details:

• Operating System: [e.g. Linux Ubuntu 18.0.4]
• Python version (python --version): [e.g. Python 3.6.8]
• Glue version (glue --version): [e.g. 0.15.6]
• How you installed glue: [e.g. conda]

Additional context

I was just trying to plot kepler exoplanet data stored in fits files downloaded from NASA k2 archive. I know 2d scatter plot is best way to visualize data, but atleast glue's GUI should give an error message on window, instead of closing it abruptly.